CN201637835U - Remote storage battery checking discharging test device - Google Patents
Remote storage battery checking discharging test device Download PDFInfo
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- CN201637835U CN201637835U CN2010201448991U CN201020144899U CN201637835U CN 201637835 U CN201637835 U CN 201637835U CN 2010201448991 U CN2010201448991 U CN 2010201448991U CN 201020144899 U CN201020144899 U CN 201020144899U CN 201637835 U CN201637835 U CN 201637835U
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000007599 discharging Methods 0.000 title abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 11
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- 238000005070 sampling Methods 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000012113 quantitative test Methods 0.000 abstract description 2
- 238000013480 data collection Methods 0.000 abstract 1
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Abstract
The utility model relates to a remote storage battery checking discharging test device, wherein the remote storage battery checking discharging test device comprises a host management machine and an intelligent discharging load, wherein a positive electrode and a negative electrode of the detection end of the intelligent discharging load are used for respectively and correspondingly connecting a positive electrode and a negative electrode of a storage battery to be tested, and the host management machine is connected with a communication port of the intelligent discharging load through network. The host management machine sends discharging test remote control instructions to the intelligent discharging load through the network, the intelligent discharging load uploads remote test data to the host management machine through the network, the in-site operation is not needed, and the utility model has the advantages of labor saving and material saving, improves the work efficiency, realizes the automatic control and real-time data collection on the discharging process of the storage battery to be tested, carries out overall qualitative and quantitative test and maintenance on the storage battery to be tested, and conforms to the development trend of increased number of unattended operation transformer stations of electric power systems at present. Further, the remote storage battery checking discharging test device of the utility model realizes the constant-current discharging on the storage battery to be tested, and further improves the precision of the remote test data.
Description
Technical field:
The utility model relates to the power system transformer substation straight-flow system accumulator property checked volume test device, relates in particular to a kind of long-range accumulator property checked discharge test device.
Background technology:
Transformer station's digitized degree is more and more higher at present; and domestic most transformer station has realized unmanned; DC power system directly provides the driving source on basis for automation equipment in standing; accumulator is again last one safety curtain of whole DC power system; in case go wrong, the thing followed is that malfunctioning, the switch tripping of protection, passage interrupt ... consequence is hardly imaginable.The great electric power accident that causes because of the accumulator problem happens occasionally in recent years, causes great economic loss.Because the complicacy and the invisibility of accumulator internal performance, accumulator always is the emphasis and the difficult point of power-source maintenance work; Up to the present, except that discharge test, being difficult to a kind of method can carry out qualitative, quantitative comprehensively test and maintenance to accumulator property.In early days, adopt variable resistance box, voltage and current table manually to finish to battery discharging, waste time and energy, the image data real-time is poor, and can't realize constant-current discharge; Along with development of science and technology, intelligent discharge load has appearred, and constant-current discharge has been realized the automatic control of discharge process, and the property checked discharge test is a a progressive step; But it must execute-in-place, and along with the fast development of electric system, increasing of transformer station's quantity is difficult to utilize intelligent load to require to finish the regular discharge test of accumulator according to rules under the condition of limited manpower and materials.Because the existence of above difficulty, a lot of units seldom carry out the discharge capacity test to accumulator, even do not do discharge test, and this buries huge hidden danger with regard to the safe operation of giving electric system.
The utility model content:
The utility model is used to provide a kind of long-range accumulator property checked discharge test device.
A kind of long-range accumulator property checked discharge test device, wherein: comprise upper managing computer, intelligent discharge load, the test side positive and negative electrode of intelligence discharge load is used for the corresponding respectively positive and negative electrode that connects accumulator to be measured, and upper managing computer connects the PORT COM of described intelligent discharge load by network.
The described long-range accumulator property checked discharge test device, wherein: described intelligent discharge load comprises data processor, communication unit, the voltage signal acquisition unit, the current signal collecting unit, power drive unit, power switch unit, resistance unit, the processor link of described communication unit connects the PORT COM of described data processor, the network connection port of described communication unit is used to connect network, described voltage signal acquisition cell signal input end just, negative pole is used for respectively, and correspondence just is being connected accumulator to be measured, on the negative pole, the signal output part of described voltage signal acquisition unit connects the voltage sampling signal input end of described data processor, the current signal collecting unit, resistance unit, the current sampling circuit that the power switch unit series connection constitutes just is being used to be connected accumulator to be measured, between the negative pole, the constant current control signal output ends of data processor connects the control end of described power switch unit by power drive unit, and the signal output part of current signal collecting unit connects the current sampling signal input end of described data processor.
The described long-range accumulator property checked discharge test device, wherein: described current signal collecting unit comprises current transformer, second operational amplifier, described current transformer is used for punching in battery positive voltage to be measured, described current transformer second end connects first end of described power switch unit by resistance unit, second end of described power switch unit is used to connect the negative pole of accumulator to be measured, the constant current control signal output ends of described data processor connects the control end of described power switch unit by power drive unit, the signal output part of current transformer connects the in-phase input end of second operational amplifier, the inverting input of second operational amplifier is leaded up to second adjustable potentiometer and is connected the output terminal of second operational amplifier, another road of the second operational amplifier inverting input is by divider resistance ground connection, and the output terminal of second operational amplifier connects the voltage sampling signal input end of described data processor.
The described long-range accumulator property checked discharge test device, wherein: described power drive unit comprises analog line driver, photoelectrical coupler, described power switch unit comprises the IGBT power switch pipe, wherein, the input end of analog line driver connects the constant current control signal output ends of the PWM width modulation of described data processor, the output terminal of analog line driver connects the negative pole link of light emitting diode in the described photoelectrical coupler, the positive pole of light emitting diode connects power supply in the photoelectrical coupler, the input termination power of light activated switch pipe in the photoelectrical coupler, the output terminal of light activated switch pipe connects the G utmost point of described IGBT power switch pipe in the photoelectrical coupler, the C utmost point of described IGBT power switch pipe is connected in series second end of described current transformer by described resistance unit, and the E utmost point of described IGBT power switch pipe is used to connect the negative pole of described accumulator to be measured.
The described long-range accumulator property checked discharge test device, wherein: described resistance unit adopts the PTC ceramic resistor.
The described long-range accumulator property checked discharge test device, wherein: described voltage signal acquisition unit comprises voltage transformer (VT), first operational amplifier, wherein, voltage transformer (VT) one secondary input end just is being used to be connected to accumulator to be measured, on the negative pole, the secondary singal output terminal of voltage transformer (VT) connects the in-phase input end of first operational amplifier, the inverting input of first operational amplifier is leaded up to first adjustable potentiometer and is connected the output terminal of first operational amplifier, another road of the first operational amplifier inverting input is by divider resistance ground connection, and the output terminal of first operational amplifier connects the voltage sampling signal input end of described data processor.
The described long-range accumulator property checked discharge test device, wherein: described upper managing computer connects the PORT COM of described intelligent discharge load by Ethernet.
The utility model adopts above-mentioned technical scheme will reach following technique effect:
The long-range accumulator property checked discharge test device of the present utility model, issue discharge test telecommand by network to intelligent discharge load by upper managing computer, the intelligence discharge load is uploaded telemetry by network and is given upper managing computer, need not execute-in-place, avoided the fatigued of round scene, saved great amount of manpower, material resources, improved work efficiency, the discharge process of long-range accumulator to be measured is realized control automatically, real-time image data, accumulator to be measured is carried out qualitative comprehensively, quantitative test and maintenance, met the development trend that present electric system unattended operation transformer station quantity increases, further, the long-range accumulator property checked discharge test device of the present utility model is realized constant-current discharge to accumulator to be measured, has further improved the degree of accuracy of telemetry.
Description of drawings:
Fig. 1 is the theory diagram of the long-range accumulator property checked of the utility model discharge test device;
Fig. 2 is a kind of circuit theory diagrams of the long-range accumulator property checked discharge test device shown in Figure 1.
Embodiment:
A kind of long-range accumulator property checked discharge test device, as shown in Figure 1, comprise upper managing computer, intelligent discharge load, the test side positive and negative electrode of intelligence discharge load is used for the corresponding respectively positive and negative electrode that connects accumulator to be measured, and upper managing computer connects the PORT COM of described intelligent discharge load by Ethernet.
Fig. 2 is a kind of circuit theory diagrams of the long-range accumulator property checked discharge test device, wherein, described intelligent discharge load comprises microprocessor U1, communication unit, voltage signal acquisition unit, current signal collecting unit, power drive unit, IGBT power switch pipe G1, PTC ceramic resistor Rp1, microprocessor U1 adopts the LM3S6938 single-chip microcomputer, be company of Texas Instrument (TI) provide first based on
Cortex
TM32 level controllers of-M3, the in-chip FLASH of 256K, the 64K on-chip SRAM, 10 A/D converter of one 8 passage, inner integrated 10/100 Ethernet media interviews control (MAC) and Physical layer (PHY), meet IEEE 802.3-2002 standard, its advantage has been its compatibility third party's ICP/IP protocol stack can be realized the ethernet terminal nodal function of single-chip; Adopt the RJ-45 ethernet interface circuit in the communication unit, it adopts network transformer/RJ45 interface chip, and model is HR911105A.
The current signal collecting unit comprises current transformer TB1, the second operational amplifier A MP2, and current transformer TB1 adopts Hall current sensor, and model is TBC50A.
The voltage signal acquisition unit comprises voltage transformer (VT) WP1, the first operational amplifier A MP1, and voltage transformer (VT) WP1 adopts electromagnetism modulation voltage sensor, and model is WPE-DV, input 0-300V, output 0-5V.
First, second operational amplifier A MP1, AMP2 adopt operational amplifier LM358.
Power drive unit comprises analog line driver U3, photoelectrical coupler TL1, and analog line driver U3 adopts Darlington transistor MC1413, improves driving force; It is TLP521-1 that photoelectricity coupling TL1 adopts model, isolates strong and weak electricity.
It is the IGBT power switch pipe of 25N120 that IGBT power switch pipe G1 adopts the model of fairchild company, 25A, 1200V; PTC ceramic resistor RP1 has advantages such as volume is little, in light weight, power big, no red heat phenomenon.
After accumulator E1 positive pole to be measured passes current sensor TB1, an end that connects PTC ceramic resistor Rp1, the other end of PTC ceramic resistor RP1 connects the C utmost point of IGBT power switch pipe G1, and the E utmost point of IGBT power switch pipe G1 is connected to the negative pole of accumulator E1 to be measured, constitutes the discharge major loop; The output terminal Jz of current sensor TB1 connects in-phase input end 3 pin of the second operational amplifier A MP2, inverting input 2 pin of the second operational amplifier A MP2 are leaded up to the second adjustable potentiometer W2 and are connected output terminal 1 pin of the second operational amplifier A MP2, another road of the second operational amplifier A MP2 inverting input, 2 pin is by divider resistance R9 ground connection, and output terminal 1 pin of second operational amplifier connects A/D input end 95 pin of described microprocessor U1; The secondary input end of voltage sensor WP1 is parallel to the positive and negative electrode of accumulator E1 to be measured, voltage sensor WP1 secondary singal output terminal Uz connects in-phase input end 3 pin of the first operational amplifier A MP1, inverting input 2 pin of the first operational amplifier A MP1 are leaded up to the first adjustable potentiometer W1 and are connected the output terminal of the first operational amplifier A MP1, another road of the first operational amplifier A MP1 inverting input, 2 pin is by divider resistance R7 ground connection, output terminal 1 pin of the first operational amplifier A MP1 connects A/D input end 1 pin of microprocessor U1, constitutes the voltage sample loop.
25 pin of microprocessor U1 connect input end 1 pin of analog line driver U3, the output terminal of analog line driver U3 links to each other with the input end of photoelectrical coupler TL1, and the output terminal of photoelectrical coupler TL1 connects the G utmost point of IGBT power switch pipe G1 and constitutes the load regulation control loop; RX+, RX-, TX+, TX-that 40,37,43,46 pin of microprocessor U1 connect RJ-45 ethernet interface circuit U2 respectively constitute order circuit, carry out communication by Ethernet and upper managing computer, accept telecommand, upload telemetry.
As shown in Figure 2, all GND, the GNDA of microprocessor U1, GNDPHY pin and CMOD0 and CMOD1 ground connection, the VDD of microprocessor U1, VDDA, VCCPHY pin all connect the 3.3V high level, and the LDO of microprocessor U1, VDD25 connect the 2.5V high level; The OSC0 of microprocessor U1, OSC1 pin are connected with the end of capacitor C 4, C5 respectively, the other end ground connection of capacitor C 4, C5, and between OSC0, the OSC1 of microprocessor U1, meet a 8M crystal oscillator M1.The XTALPPHY of microprocessor U1, XTALNPHY pin link to each other with the end of capacitor C 2, C3 respectively, the other end ground connection of capacitor C 2, C3, and between the XTALPPHY of microprocessor U1, XTALNPHY pin, meet a 25M crystal oscillator M2 and make microprocessor U1 operate as normal.Resistance R 1, R2, R3, the TXCT of the end of R4 and RJ-45 ethernet interface circuit U2, the RXCT pin is connected with the 3.3V power supply jointly, 37 pin of resistance R 1 other end and microprocessor U1 (RXIN pin), the RX-pin of RJ-45 ethernet interface circuit U2 links to each other, 40 pin of resistance R 2 other ends and microprocessor U1 (RXIP pin), the RX+ pin of RJ-45 ethernet interface circuit U2 links to each other, 46 pin of resistance R 3 other ends and microprocessor U1 (TXON pin), the TX-pin of RJ-45 ethernet interface circuit U2 links to each other, 43 pin of resistance R 4 other ends and microprocessor U1 (TXOP pin), the TX+ pin of RJ-45 ethernet interface circuit U2 links to each other, the GND pin ground connection of RJ-45 ethernet interface circuit U2; Resistance R 1, R2, R3, R4 and RJ-45 ethernet interface circuit U2 form ethernet interface circuit, are used to be connected Ethernet.The RST pin of microprocessor U1 is connected with an end of an end of resistance R 11 and capacitor C 1, another termination 3.3V power supply of resistance R 11, and the other end ground connection of capacitor C 1 is used to finish the electrification reset function.The PC4 pin of microprocessor U1 links to each other with 1 pin of analog line driver U3 (IN pin), 9 pin of analog line driver U3 (COM pin) are connected with the 12V power supply, 16 pin of analog line driver U3 (OUT pin) link to each other with 2 pin of photoelectrical coupler TL1,1 pin of photoelectrical coupler TL1 connects the 12V power supply, 4 pin of photoelectrical coupler TL1 with another through isolate+12 power supplys are connected, 3 pin of photoelectrical coupler TL1 extremely link to each other with the G of an end of resistance R 5 and IGBT power switch pipe G1, the other end ground connection of resistance R 5, the E utmost point of IGBT power switch pipe G1 is connected with the negative pole of accumulator E1 to be measured, the C utmost point of IGBT power switch pipe G1 connects the end of PTC ceramic resistor Rp1, the other end of PTC ceramic resistor Rp1 is connected PTC ceramic resistor Rp1 with accumulator E1 to be measured is anodal after passing current sensor TB1, IGBT power switch pipe G1, photoelectrical coupler TL1, analog line driver U3, resistance R 5, resistance R 6 constitutes main discharge circuit and control circuit thereof together.Voltage transformer (VT) WP1 one secondary input end U+ pin is connected with accumulator E1 to be measured is anodal, voltage transformer (VT) WP1 one secondary input end U-pin is connected with accumulator E1 negative pole to be measured, voltage sensor WP1 secondary output terminal+the E pin connects the 12V power supply, GND pin ground connection, the signal output connecting pin Uz pin of voltage sensor WP1 secondary output terminal connects an end of resistance R 8, the other end of resistance R 8 links to each other with in-phase input end 3 pin of the first operational amplifier A MP1, one end ground connection of resistance R 7, the other end links to each other with inverting input 2 pin of the first operational amplifier A MP1 and first fixed juncture of potentiometer W1, second fixed juncture of potentiometer W1, sliding point is connected voltage sensor WP1 with output terminal 1 pin of the first operational amplifier A MP1 and the 1 pin ADC0 pin of microprocessor U1, resistance R 7, resistance R 8, the first potentiometer W1 and the first operational amplifier A MP1 constitute the voltage signal modulate circuit together.Current sensor TB1 punching is in the end connecting line of accumulator E1 positive pole to be measured and PTC ceramic resistor Rp1, current sensor TB1 output terminal+the E pin meets 12V,-E pin connects-12V, GND pin ground connection, signal output part Uz connects an end of resistance R 10, the other end of resistance R 10 links to each other with 3 pin of the second operational amplifier A MP2, one end ground connection of resistance R 9, the other end links to each other with 2 pin of the second operational amplifier A MP2 and first fixed juncture, 1 pin of the second potentiometer W2, second fixed juncture 2 of potentiometer W2, sliding fixed point 3 pin are connected current transformer TB1 with 1 pin of the second operational amplifier A MP2 and the 95 pin ADC7 pin of microprocessor U1 respectively, resistance R 9, resistance R 10, the second potentiometer W2 and the second operational amplifier A MP2 constitute the current signal modulate circuit together.
After microprocessor U1 in the intelligence discharge load receives upper managing computer remote control discharge instruction by communication unit from Ethernet, adopt the PWM pulse width modulation mode, 25 pin by microprocessor U1 drive photoelectrical coupler TL1 by analog line driver U3, promote IGBT power switch pipe G1 by photoelectrical coupler TL1 again and control PTC ceramic resistor Rp1 switching, thereby regulate the discharge current of accumulator E1 to be measured, regulate constant current output continuously according to electric power rules realization electric current; Voltage sensor WP1; current sensor TB1 is respectively the voltage that collects; electric current forceful electric power Signal Spacing changes 0～5V weak electric signal correspondence into and passes to first; the second operational amplifier A MP1; AMP2; after processing and amplifying; pass to 1 pin of microprocessor U1 respectively; 95 pin; microprocessor U1 gathers; calculate; arrangement obtains the total voltage of accumulator to be measured; related datas such as discharge current; monitor the variation of above-mentioned data simultaneously; shut down or artificially end to shut down up to the discharge off condition protection that has arbitrary data to satisfy electric power rules regulation, and upload battery total voltage by Ethernet to upper managing computer through RJ-45 ethernet interface circuit U2 in real time; telemetries such as discharge current.
Claims (7)
1. the long-range accumulator property checked discharge test device, it is characterized in that: comprise upper managing computer, intelligent discharge load, the test side positive and negative electrode of intelligence discharge load is used for the corresponding respectively positive and negative electrode that connects accumulator to be measured, and upper managing computer connects the PORT COM of described intelligent discharge load by network.
2. the long-range accumulator property checked discharge test device as claimed in claim 1, it is characterized in that: described intelligent discharge load comprises data processor, communication unit, the voltage signal acquisition unit, the current signal collecting unit, power drive unit, power switch unit, resistance unit, the processor link of described communication unit connects the PORT COM of described data processor, the network connection port of described communication unit is used to connect network, described voltage signal acquisition cell signal input end just, negative pole is used for respectively, and correspondence just is being connected accumulator to be measured, on the negative pole, the signal output part of described voltage signal acquisition unit connects the voltage sampling signal input end of described data processor, the current signal collecting unit, resistance unit, the current sampling circuit that the power switch unit series connection constitutes just is being used to be connected accumulator to be measured, between the negative pole, the constant current control signal output ends of data processor connects the control end of described power switch unit by power drive unit, and the signal output part of current signal collecting unit connects the current sampling signal input end of described data processor.
3. the long-range accumulator property checked discharge test device as claimed in claim 2, it is characterized in that: described current signal collecting unit comprises current transformer, second operational amplifier, described current transformer is used for punching in battery positive voltage to be measured, described current transformer second end connects first end of described power switch unit by resistance unit, second end of described power switch unit is used to connect the negative pole of accumulator to be measured, the constant current control signal output ends of described data processor connects the control end of described power switch unit by power drive unit, the signal output part of current transformer connects the in-phase input end of second operational amplifier, the inverting input of second operational amplifier is leaded up to second adjustable potentiometer and is connected the output terminal of second operational amplifier, another road of the second operational amplifier inverting input is by divider resistance ground connection, and the output terminal of second operational amplifier connects the voltage sampling signal input end of described data processor.
4. the long-range accumulator property checked discharge test device as claimed in claim 3, it is characterized in that: described power drive unit comprises analog line driver, photoelectrical coupler, described power switch unit comprises the IGBT power tube, wherein, the input end of analog line driver connects the constant current control signal output ends of the PWM width modulation of described data processor, the output terminal of analog line driver connects the negative pole link of light emitting diode in the described photoelectrical coupler, the positive pole of light emitting diode connects power supply in the photoelectrical coupler, the input termination power of light activated switch pipe in the photoelectrical coupler, the output terminal of light activated switch pipe connects the G utmost point of described IGBT power tube in the photoelectrical coupler, the C utmost point of described IGBT power tube is connected in series second end of described current transformer by described resistance unit, and the E utmost point of described IGBT power tube is used to connect the negative pole of described accumulator to be measured.
5. the long-range accumulator property checked discharge test device as claimed in claim 4 is characterized in that: described resistance unit adopts the PTC ceramic resistor.
6. as each the described long-range accumulator property checked discharge test device of claim 1 to 5, it is characterized in that: described voltage signal acquisition unit comprises voltage transformer (VT), first operational amplifier, wherein, voltage transformer (VT) one secondary input end just is being used to be connected to accumulator to be measured, on the negative pole, the secondary singal output terminal of voltage transformer (VT) connects the in-phase input end of first operational amplifier, the inverting input of first operational amplifier is leaded up to first adjustable potentiometer and is connected the output terminal of first operational amplifier, another road of the first operational amplifier inverting input is by divider resistance ground connection, and the output terminal of first operational amplifier connects the voltage sampling signal input end of described data processor.
7. the long-range accumulator property checked discharge test device as claimed in claim 6, it is characterized in that: described upper managing computer connects the PORT COM of described intelligent discharge load by Ethernet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201448991U CN201637835U (en) | 2010-03-30 | 2010-03-30 | Remote storage battery checking discharging test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201448991U CN201637835U (en) | 2010-03-30 | 2010-03-30 | Remote storage battery checking discharging test device |
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| CN201637835U true CN201637835U (en) | 2010-11-17 |
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| CN2010201448991U Expired - Lifetime CN201637835U (en) | 2010-03-30 | 2010-03-30 | Remote storage battery checking discharging test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998627A (en) * | 2012-12-21 | 2013-03-27 | 江苏省电力公司镇江供电公司 | Remote intelligent maintaining device of transformer substation storage battery |
| CN105137228A (en) * | 2015-09-11 | 2015-12-09 | 上海斐讯数据通信技术有限公司 | Electric discharging device and testing system comprising the same |
-
2010
- 2010-03-30 CN CN2010201448991U patent/CN201637835U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998627A (en) * | 2012-12-21 | 2013-03-27 | 江苏省电力公司镇江供电公司 | Remote intelligent maintaining device of transformer substation storage battery |
| CN105137228A (en) * | 2015-09-11 | 2015-12-09 | 上海斐讯数据通信技术有限公司 | Electric discharging device and testing system comprising the same |
| CN105137228B (en) * | 2015-09-11 | 2017-12-19 | 上海斐讯数据通信技术有限公司 | A kind of electric discharge device and the test system comprising the electric discharge device |
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Owner name: ELECTRIC POWER RESEARCH INSTITUTE OF HE'NAN ELECTR Free format text: FORMER OWNER: HENAN INSTITUTE OF POWER EXPERIMENT Effective date: 20121214 Owner name: HEBEI CHUANGKE ELECTRONIC TECHNOLOGY CO., LTD. STA Free format text: FORMER OWNER: HEBEI CHUANGKE ELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20121214 |
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Effective date of registration: 20121214 Address after: 450052 Songshan South Road, Henan, No. 85, No. Patentee after: Henan Electric Power Corporation Electric Power Science Research Institute Patentee after: Hebei Chuangke Electronic Technology Co., Ltd. Patentee after: State Grid Corporation of China Address before: 450052 Songshan South Road, Henan, No. 85, No. Patentee before: Henan Institute of Power Experiment Patentee before: Hebei Chuangke Electronic Technology Co., Ltd. |
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Granted publication date: 20101117 |